|You can't do anything if the keyboard won't work. |
Drivers are not required for it before Windows loads.
Most modern laptops cannot run or cannot run properly on the AC adaptor alone when the main battery is not installed or is dead.
If the keyboard won't work, the only solution is to replace it.
Does any of the following apply ??
Did the owner drop the laptop, or spill any liquid on it, or expose to any liquid, such as rain, whether it was running at the time or not, since the keyboard last worked?
Has anyone been fiddling with the wiring connection of the keyboard or with anything inside it's base ?